Re: [patch net-next RFC 00/10] introduce line card support for modular switch

Mon, Jan 18, 2021 at 11:55:45PM CET, dsahern@gmail.com wrote:

On 1/18/21 6:00 AM, Jiri Pirko wrote:

quoted

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Reconfiguring routing is not the end of the world.

Well, yes, but you don't really want netdevices to come and go then you
plug in/out cables/modules. That's why we have split implemented as we

And you don't want a routing daemon to use netdevices which are not
valid due to non-existence. Best case with what you want is carrier down
on the LC's netdevices and that destroys routing.

There are other things. The user may configure the netdev parameters in
advance, like mtu, put it in a bridge, setup TC filters on it etc.
The linecard unplug/plug does not destroy the settings. This is the same
thing with split ports and that is why we have implemented split ports
in "provision" mode as well.

quoted

do. I don't understand why do you think linecards are different.

I still don't get why you expect linecards to be different than any
other hotplug device.

It it not a device, does not have "struct device" related to it.
It is just a phy part of another device.